A photographing device includes a display that displays a screen, a photographing unit that is arranged on the same plane as the display, and a mirror that is arranged so that at least a portion of the display is capable of being photographed by the photographing unit. The housing defines an axial flowbore and the mandrel defines a mandrel axial flowbore. The second fin structure and the third fin structure are formed of a different material than the first fin structure. Alternatively, The memory module that a rigidflex circuit board. The first transformation may include a non-linear transformation.